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ZEN Graphene Solutions Announces Filing of Patent Applications Under the Patent Cooperation Treaty

GUELPH, ON / ACCESSWIRE / October 6, 2021 / ZEN Graphene Solutions Ltd. ("ZEN" or the "Company")(TSXV:ZEN)(OTC:ZENYF), a Canadian, nanotechnology company focused on next-gen healthcare solutions, announces that it has filed a full international patent ap